export interface OAuthConfig {
    accessToken?: string | null;
    refreshToken?: string | null;
    clientId?: string | null;
    clientSecret?: string | null;
}
export interface OAuthTokenManagerOptions {
    tokenUrl: string;
    providerLabel: string;
    ttlMs?: number;
    refreshTimeoutMs?: number;
}
export declare class OAuthTokenManager {
    private readonly logger;
    private readonly providerLabel;
    private readonly tokenUrl;
    private readonly ttlMs;
    private readonly refreshTimeoutMs;
    private cachedAccessToken;
    private cachedAccessTokenExpiresAt;
    private inflightRefresh;
    constructor(options: OAuthTokenManagerOptions);
    resolveAccessToken(config: OAuthConfig | null): Promise<string>;
    private refreshAccessToken;
}